US11706070B1ActiveUtility

Slot alignment between cyclic-prefix-based waveforms and guard-interval-based waveforms

91
Assignee: QUALCOMM INCPriority: Mar 24, 2022Filed: Mar 24, 2022Granted: Jul 18, 2023
Est. expiryMar 24, 2042(~15.7 yrs left)· nominal 20-yr term from priority
Inventors:Hemant SaggarIyab Issam SakhniniTao Luo
H04L 27/2607H04L 27/2602H04L 27/2605
91
PatentIndex Score
2
Cited by
3
References
30
Claims

Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a network entity, a configuration of a cyclic prefix (CP) frame structure associated with a CP-based waveform and a guard interval (GI) frame structure associated with a GI-based waveform, wherein the CP frame structure includes multiple CP slots arranged in a half subframe, wherein the GI frame structure includes multiple GI slots arranged in the half subframe, and wherein a first GI slot is associated with one of an extra portion, a truncated portion, or a removed portion such that a boundary of the first GI slot aligns with a boundary of a first CP slot. The UE may transmit or receive a first message in the half subframe via the GI-based waveform using the first GI slot. Numerous other aspects are described.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
       1. An apparatus for wireless communication at a user equipment (UE), comprising:
 a memory; and 
 one or more processors, coupled to the memory, configured to:
 receive, from a network entity, a configuration of a cyclic prefix (CP) frame structure associated with a CP-based waveform and a guard interval (GI) frame structure associated with a GI-based waveform, wherein the CP frame structure includes multiple CP slots arranged in a half subframe, wherein the GI frame structure includes multiple GI slots arranged in the half subframe, and wherein a first GI slot, of the multiple GI slots, is associated with one of an extra portion, a truncated portion, or a removed portion such that a boundary of the first GI slot aligns with a boundary of a first CP slot, of the multiple CP slots; and 
 transmit or receive a first message in the half subframe via the GI-based waveform using the first GI slot. 
 
 
     
     
       2. The apparatus of  claim 1 , wherein the first GI slot is associated with the extra portion, and wherein a second GI slot, of the multiple GI slots, is associated with one of a truncated portion or a removed portion such that a boundary of the second GI slot aligns with a boundary of a second CP slot, of the multiple CP slots. 
     
     
       3. The apparatus of  claim 2 , wherein the CP frame structure and the GI frame structure are associated with a Fast Fourier Transform (FFT) size of 4096 samples, wherein a length of the extra portion is 32*2μ−64 samples with μ being associated with a numerology used for transmission, and wherein a length of the one of the truncated portion or the removed portion is 4032 samples. 
     
     
       4. The apparatus of  claim 2 , wherein the first GI slot is a first-in-time slot of the half subframe, and wherein the second GI slot is a second-in-time or later slot of the half subframe. 
     
     
       5. The apparatus of  claim 1 , wherein the first GI slot is associated with the removed portion, and wherein the removed portion is associated with a removed last-in-time symbol of the first GI slot. 
     
     
       6. The apparatus of  claim 1 , wherein the one of the extra portion, the truncated portion, or the removed portion is associated with a gap between the first GI slot and a second GI slot, of the multiple GI slots. 
     
     
       7. The apparatus of  claim 1 , wherein the one of the extra portion, the truncated portion, or the removed portion is associated with samples in a time domain that are not associated with an orthogonal frequency division multiplexing (OFDM) symbol. 
     
     
       8. The apparatus of  claim 1 , wherein the one of the extra portion, the truncated portion, or the removed portion is associated with a zero-tailed orthogonal frequency division multiplexing (OFDM) symbol. 
     
     
       9. The apparatus of  claim 1 , wherein the one or more processors are further configured to transmit or receive a second message, later-in-time to the first message, in the half subframe via the CP-based waveform using the first CP slot, wherein the first GI slot is associated with the extra portion such that the second message begins at the boundary of the first CP slot. 
     
     
       10. The apparatus of  claim 9 , wherein the first message is further transmitted or received in a second GI slot, of the multiple GI slots, occurring prior-in-time to the first GI slot, and wherein the second GI slot is not associated with an extra portion, a truncated portion, or a removed portion. 
     
     
       11. The apparatus of  claim 9 , wherein the CP frame structure and the GI frame structure are associated with a Fast Fourier Transform (FFT) size of 4096 samples, and wherein a length of the extra portion is 32*2μ−64(k+1) samples with μ being associated with a numerology used for transmission and k corresponding to a slot index of the first GI slot. 
     
     
       12. The apparatus of  claim 1 , wherein the one or more processors are further configured to transmit or receive a second message, prior-in-time to the first message, in the half subframe via the CP-based waveform using the first CP slot, wherein the first GI slot is associated with one of the truncated portion or the removed portion such that the first message begins at the boundary of the first GI slot. 
     
     
       13. The apparatus of  claim 12 , wherein the first message is further transmitted or received in a second GI slot, of the multiple GI slots, occurring later-in-time to the first GI slot, and wherein the second GI slot is not associated with an extra portion, a truncated portion, or a removed portion. 
     
     
       14. The apparatus of  claim 12 , wherein the CP frame structure and the GI frame structure are associated with a Fast Fourier Transform (FFT) size of 4096 samples, and wherein a length of the one of the truncated portion or the removed portion is 32*2μ−64(k+1) samples with μ being associated with a numerology used for transmission and k corresponding to a slot index of a slot immediately preceding the first GI slot. 
     
     
       15. An apparatus for wireless communication at a network entity, comprising:
 a memory; and 
 one or more processors, coupled to the memory, configured to:
 transmit, to a user equipment (UE), a configuration of a cyclic prefix (CP) frame structure associated with a CP-based waveform and a guard interval (GI) frame structure associated with a GI-based waveform, wherein the CP frame structure includes multiple CP slots arranged in a half subframe, wherein the GI frame structure includes multiple GI slots arranged in the half subframe, and wherein a first GI slot, of the multiple GI slots, is associated with one of an extra portion, a truncated portion, or a removed portion such that a boundary of the first GI slot aligns with a boundary of a first CP slot, of the multiple CP slots; and 
 transmit or receive a first message in the half subframe via the GI-based waveform using the first GI slot. 
 
 
     
     
       16. The apparatus of  claim 15 , wherein the first GI slot is associated with the extra portion, and wherein a second GI slot, of the multiple GI slots, is associated with one of a truncated portion or a removed portion such that a boundary of the second GI slot aligns with a boundary of a second CP slot, of the multiple CP slots. 
     
     
       17. The apparatus of  claim 16 , wherein the CP frame structure and the GI frame structure are associated with a Fast Fourier Transform (FFT) size of 4096 samples, wherein a length of the extra portion is 32*2μ−64 samples with μ being associated with a numerology used for transmission, and wherein a length of the one of the truncated portion or the removed portion is 4032 samples. 
     
     
       18. The apparatus of  claim 16 , wherein the first GI slot is a first-in-time slot of the half subframe, and wherein the second GI slot is a second-in-time or later slot of the half subframe. 
     
     
       19. The apparatus of  claim 15 , wherein the first GI slot is associated with the removed portion, and wherein the removed portion is associated with a removed last-in-time symbol of the first GI slot. 
     
     
       20. The apparatus of  claim 15 , wherein the one of the extra portion, the truncated portion, or the removed portion is associated with a gap between the first GI slot and a second GI slot, of the multiple GI slots. 
     
     
       21. The apparatus of  claim 15 , wherein the one of the extra portion, the truncated portion, or the removed portion is associated with samples in a time domain that are not associated with an orthogonal frequency division multiplexing (OFDM) symbol. 
     
     
       22. The apparatus of  claim 15 , wherein the one of the extra portion, the truncated portion, or the removed portion is associated with a zero-tailed orthogonal frequency division multiplexing (OFDM) symbol. 
     
     
       23. The apparatus of  claim 15 , wherein the one or more processors are further configured to transmit or receive a second message, later-in-time to the first message, in the half subframe via the CP-based waveform using the first CP slot, wherein the first GI slot is associated with the extra portion such that the second message begins at the boundary of the first CP slot. 
     
     
       24. The apparatus of  claim 23 , wherein the first message is further transmitted or received in a second GI slot, of the multiple GI slots, occurring prior-in-time to the first GI slot, and wherein the second GI slot is not associated with an extra portion, a truncated portion, or a removed portion. 
     
     
       25. The apparatus of  claim 15 , wherein the one or more processors are further configured to transmit or receive a second message, prior-in-time to the first message, in the half subframe via the CP-based waveform using the first CP slot, wherein the first GI slot is associated with one of the truncated portion or the removed portion such that the first message begins at the boundary of the first GI slot. 
     
     
       26. The network entity of  claim 25 , wherein the first message is further transmitted or received in a second GI slot, of the multiple GI slots, occurring later-in-time to the first GI slot, and wherein the second GI slot is not associated with an extra portion, a truncated portion, or a removed portion. 
     
     
       27. A method of wireless communication performed by a user equipment (UE), comprising:
 receiving, from a network entity, a configuration of a cyclic prefix (CP) frame structure associated with a CP-based waveform and a guard interval (GI) frame structure associated with a GI-based waveform, wherein the CP frame structure includes multiple CP slots arranged in a half subframe, wherein the GI frame structure includes multiple GI slots arranged in the half subframe, and wherein a first GI slot, of the multiple GI slots, is associated with one of an extra portion, a truncated portion, or a removed portion such that a boundary of the first GI slot aligns with a boundary of a first CP slot, of the multiple CP slots; and 
 transmitting or receiving a first message in the half subframe via the GI-based waveform using the first GI slot. 
 
     
     
       28. The method of  claim 27 , wherein the first GI slot is associated with the extra portion, and wherein a second GI slot, of the multiple GI slots, is associated with one of a truncated portion or a removed portion such that a boundary of the second GI slot aligns with a boundary of a second CP slot, of the multiple CP slots. 
     
     
       29. A method of wireless communication performed by a network entity, comprising:
 transmitting, to a user equipment (UE), a configuration of a cyclic prefix (CP) frame structure associated with a CP-based waveform and a guard interval (GI) frame structure associated with a GI-based waveform, wherein the CP frame structure includes multiple CP slots arranged in a half subframe, wherein the GI frame structure includes multiple GI slots arranged in the half subframe, and wherein a first GI slot, of the multiple GI slots, is associated with one of an extra portion, a truncated portion, or a removed portion such that a boundary of the first GI slot aligns with a boundary of a first CP slot, of the multiple CP slots; and 
 transmitting or receiving a first message in the half subframe via the GI-based waveform using the first GI slot. 
 
     
     
       30. The method of  claim 29 , further comprising transmitting or receiving a second message, later-in-time to the first message, in the half subframe via the CP-based waveform using the first CP slot, wherein the first GI slot is associated with the extra portion such that the second message begins at the boundary of the first CP slot.

Cited by (0)

No later patents cite this yet.

References (0)

No backward citations on record.